121210010110 has 128 divisors (see below), whose sum is σ = 259076579328. Its totient is φ = 39968640000.

The previous prime is 121210010099. The next prime is 121210010147. The reversal of 121210010110 is 11010012121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 78553999 + ... + 78555541.

It is an arithmetic number, because the mean of its divisors is an integer number (2024035776).

Almost surely, 2^121210010110 is an apocalyptic number.

121210010110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121210010110 is an abundant number, since it is smaller than the sum of its proper divisors (137866569218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121210010110 is a wasteful number, since it uses less digits than its factorization.

121210010110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121210010110 its reverse (11010012121), we get a palindrome (132220022231).

The spelling of 121210010110 in words is "one hundred twenty-one billion, two hundred ten million, ten thousand, one hundred ten".